问我的第一个python tkinter简单MVC列表元素所需的反馈要打印到标签

EN

import tkinter as tk


class Model():

    def __init__(self):
      self.list = ["email", "sms", 'voice']

class View(tk.Frame):
    def __init__(self, parent, controller):
        self.controller = controller
        tk.Frame.__init__(self, parent, bg="yellow", bd=2, 
           relief=tk.RIDGE)
        self.parent = parent
        self.pack()

        self.labelVariable=tk.StringVar()
        self.output=tk.Label(self, textvariable=self.labelVariable, 
             bg="orange", fg="white")
        self.output.pack()

        self.hello = tk.Button(self, text="Show", command= 
             self.controller.hello_Button_Pressed,  bd=2,            
             relief=tk.RIDGE)
        self.hello.pack(side="left")


class Controller():
    def __init__(self):
        self.root = tk.Tk()
        self.model = Model()
        self.view = View(self.root, self)

        self.root.title("MVC example")
        self.root.geometry("250x350")
        self.root.config(background="LightBlue4")
        self.root.mainloop()

    def hello_Button_Pressed(self):
        self.view.labelVariable.set(self.model.list)

if __name__ == '__main__':
    c = Controller()